Just remember that whatever has happened in your past, God can create you anew! God has new mercies for everyday. Let the past be the best and focus on what is your present. You will miss the wonderful things God wants to show you now. being able and wanting to change things of the past is a lie from Satan. In the end none of these things will even matter if you give your life to the Lord. We are focused on attaining Heaven which is absolutely nothing compared to the things of this earth. God doesn’t want you to be a slave of your past. He died to set you free. Whatever it is holding you back, repent of it and look onward to Christ. He is waiting for you with open arms.